Naval tech bug & loading saved games bug
The naval tech tree gives new transport models: 'Transport' and 'Armoured Transport'.
The units\transport.txt file only has one model.
If a country has researched one of these then it will prevent a saved game from loading.
A quick hack for this is just to repeat the current contents of the transport.txt file twice.
I don't yet know if this occurs in any of the other tech trees.
The naval tech tree gives new transport models: 'Transport' and 'Armoured Transport'.
The units\transport.txt file only has one model.
If a country has researched one of these then it will prevent a saved game from loading.
A quick hack for this is just to repeat the current contents of the transport.txt file twice.
I don't yet know if this occurs in any of the other tech trees.